Update testing file to use test data repository

Author: rohangirishrao

tests/interactive-imagej/bioformats/metadata/test_metadata.md

@@ -5,17 +5,20 @@ Copy the following code to a Fiji that has the release `python-imcflibs-1.5.0.ja
 Add the source folder and the names of the files under the corresponding lines, and run the script. If the metadata is printed in Fiji output, the methods are working as intended
 
 ```
+# @ File (label="IMCF testdata location", style="directory") IMCF_TESTDATA
+
 import os
+from imcflibs.pathtools import join2
 from imcflibs.imagej import bioformats
 from ij import IJ
 
 # Testing for the metadata retrieval through Bioformats
 
 # Add directory path here that contains the files you wish to test for
-path = r"U:\\VAMP\\rohang0000\\stage_test"
-file_path_1 = os.path.join(path, "DON_25922_20250201_25922_2_01.vsi")
-file_path_2 = os.path.join(path, "DON_25922_20250201_25922_2_02.vsi")
-file_path_3 = os.path.join(path, "DON_25922_20250201_25922_2_03.vsi")
+
+file_path_1 = join2(IMCF_TESTDATA, "bioformats/DON_25922_20250201_25922_2_01.vsi")
+file_path_2 = join2(IMCF_TESTDATA, "bioformats/DON_25922_20250201_25922_2_02.vsi")
+file_path_3 = join2(IMCF_TESTDATA, "bioformats/DON_25922_20250201_25922_2_03.vsi")
 
 metadata = bioformats.get_metadata_from_file(file_path_1)
 print(metadata.unit_width)